Slide-block for reciprocating-saw mills



E. HAAKB Patented Dee. 20, '1887'.

l I me,

SLIDE BLOCK FORRECIPROCATING SAW MILLS.

(No Model.)

lllllllll ll UNITED STATES PATENT OFFICE.

ERNST HAAKE, OF WINONA, MINNESOTA.

SLIDE-BLOCK FOR RECIPROCATING-*SAW MILLS.

SPECIFICATION forming part of Letters Patent No. 375,285, dated December 20, 1887.

To @ZZ whom, it may concern.'

Be it known that I, ERNST HAAKE, a citizen of the United States, residing at Winona, in the county of Winona and State of Minnesota, have invented certain new and useful Improvements in Slide-Blocks for Reciprocating-Saw Mills; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. Thisinvention has relation to improvements in reciprocating-saw mills. y

The main object of my'invention is to provide a means which will obviate the breakage of the wrist-pins in the reciprocating gangfranie primarily resulting from the Weight of the slide blocks or bearings.

A further object is to provide a slide block or bearing which will possess the twofold function of lightness and durability.

A further object is to construct such a block in a manner that its various parts may be removed, repaired, and replaced without impairing the usefulness of the other parts. j

It has been found in practice that blocks formed entirely of metal are so heavy that in a rapid running of the mill at the reverse of the stroke the wrist-pins of the gang-gate often break and cause serious damage to the working of the mill; and, again, when the blocks are formed entirely of wood, as has also been the practice, such blocks, owing to their fragile nature, are soon worn and destroyed.

My invention will be fully understood from the following description and claims, when taken in connection with the annexed drawings, in which- Figure l is a side view of a reciprocatingsaw mill carrying my improvements. Fig. 2 is a vertical central view of the same. Fig. 3 is a perspective View of the bearing-guides removed frorn the frame. Fig. 4 is a side view of one of the reciprocating or slide bearings on an enlarged scale. Fig. 5 is a transverse sectional view of the same. Fig. 6 is a longitudinal sectional view of the same. Fig. 7 is a View of the Babbitt metal bearing removed from one of the blocks. Fig. 8 is a sideview of one of the metallic strips removed from the block, and Fig. 9 is a cross-sectional view taken von the lines y y of Fig. 7.

Referring by letter to the said drawings, A indicates the frame of a reciprocatingsaw mill, which may be of any ordinary or approved construction; and B indicates the gan g-gate, havin g the lateral wrist -pins bearing in the slide blocks or bearings, as will be presently eX- plained.

C C indicate guideways for the sliding beariug-blocks. These guides are composed of a flat vertical base and a rectangular ange at opposite longitudinal edges, as shown. These slides may be made adjustable, so that the same may accommodate themselves or be adjusted according to the wearing of the slide-blocks. I employ two. of these guides on each inner vertical wall of the frame, the lower ones being pivotal] y connected with the said walls at their lower ends, and the upper ones connected in a similar manner at their upper ends. Thus it will be seen that the adjacent ends of the guides are not connected with the walls of the frame, but are pivotally connected by means of alink, b,with lone end of a vibratory lever, D, which is fixed to a transverse rock-shaft, E, and the opposite end of this lever is connected with the gang-gate by means of a pivotal link, F. By this construction it will be seen that when motion has been imparted to the lever D it will be communicated to the gang-frame and the latter given a vertical reciprocation.

G indicates one of myimproved slide-blocks or reciprocating bearings, which are adapted to receive the Wrist-pins of the gang-gate and travel in the guides before mentioned. These blocks are of a peculiar construction, the superficial surface or exterior which bears in the guides being formed of wood, as indicated at d, and are made in two outer halves. These blocks are recessed on their inner sides, as indicated at e, to receive a Babbitt-metal bearing and the depression in straps for the same, as will be now explained. These metal straps H H aredepressed at I in a form to snugly sit in the recesses e of the blocks, and in these depressions or recesses is placed a bearing of Babbitt metal for the reception of the wristpins of the gang-gate. The form of this bearing is more fully shown in Fig. 7 of the drawings, having lateral anges, as shown, to retain the same in its seat, and an aperture which communicates with an aperture in the metallic straps H H', oblique channels f f passing up- IOO Wardly through the blocks,whereby lubricant may be fed to the bearings Without removing any of the parts. These metal straps H H are secured to the inner sides of the wooden blocks by means of screws, and their ends are extended and perforated transversely for the reception of fastening-bolts J.

It will be observed that the strap H has its ends flanged, so that they will engage the transverse edges of the strap H', thereby serving as a means for preventing the two sections from turning or longitudinal displacement. It is preferable that the apertures in the extended portions of one ofthe straps should be screwtapped, so that, in addition to the nut for holding the securing-bolt, the bolt itself may be turned into the threads of the said aperture.

By this construction it will be seen that the slide-blocks are very light and cheap, and I have a block which possesses the advantages of a block formed entirely of Wood or entirely of metal Without the disadvantages of either. It will also be seen that as the wooden surfaces Wear out they may be readily removed and replaced by others at a minimum expense. It Will also be seen that the journal-bearings may be removed and replaced in a similar manner, and the parts may be put together and taken apart Without the employment of skilled labor. I attach importance to the fact.that I get a light slide, as the same will not cause damage to the wrist-pins of the gang-gate, and I also attach importance to the fact that the Wearing of one portion of the block will not cause damage or loss to the other parts thereof.

king in the said recesses, and the removable journalbearings in the said straps and blocks,

and the fastening devices for the straps, substantially as specilied.

2. The combination, with the wooden sections and the j ournal-bearings, ofthe metallic Straps secured to the adjacent faces thereof, one ofthe said straps having its ends fianged and adapted to engage the ends of the opposite strap, and the bolts for connecting the said straps, substantially as specied.

3. The combination, with the outer wooden sections, of the metallic straps secured to the adjacent faces thereof', the removable bearing for the wrist-pins of the gang-gate, and the channel passing through the blocks and straps and communicating with the said journals, substantially as specied.

In testimony whereof I aflix my signature in presence of two witnesses.

ERNST I-IAAKE.

Wtnesses:

IV. A. FlNKELNnUnG, HENRY Person. 

